dB Killer is an acoustic muffler that is installed in the exhaust system of a motorcycle or scooter. It is designed to reduce the noise level emitted by the engine, which is required by noise emission regulations in many countries. The use of a dB Killer muffler is also recommended for safety reasons, as it reduces noise, allowing drivers to hear other vehicles and their surroundings better.It comes in the form of a pipe-muffling insert, primarily for mufflers on motorcycles. It is a device, consisting of several superimposed metal meshes or perforated foil, which enclose the exhaust light, but there are also cylindrical and curved Db Killers, which allow less power loss. It is selected taking into account the very structure of the exhaust, so we need to know the inside diameter of the muffler.
The size and design of the dB Killer can vary depending on the manufacturer and model of the motorcycle or scooter, but it is usually able to reduce the noise level emitted by the engine by several decibels (dB). For example, a dB Killer muffler can reduce the noise level emitted by a motorcycle engine by about 5-10 dB. However, keep in mind that the noise level is measured on a logarithmic scale, which means that a 10dB reduction actually means a halving of the noise level.
Db Killer's job is to reduce the flow of exhaust gases, this reduces the loudness of the exhaust system but unfortunately negatively affects the performance of the motorcycle itself, the difference may be negligible.